Password Hash Generator (PBKDF2)

Storing passwords as plain text, or even as a fast hash like MD5 or SHA-256, is a well-documented way to turn one breach into a catastrophe: attackers who steal your database can test billions of guesses per second against a fast hash. Password hashing functions are deliberately the opposite of fast. PBKDF2 (Password-Based Key Derivation Function 2), the NIST-recommended function this tool implements via the browser's built-in Web Crypto API, takes your password plus a random salt and runs the underlying hash tens or hundreds of thousands of times. That work factor is the whole point — it makes verifying one legitimate login take a fraction of a second (unnoticeable to a user) while making an offline brute-force attack proportionally more expensive. The random salt means two users with the same password get completely different hashes, defeating precomputed 'rainbow table' attacks. PBKDF2 sits in the same family as bcrypt, scrypt, and Argon2 — all 'slow' password hashes — and is built into virtually every platform's crypto library, which is why it's a safe default. This page generates an equivalent-strength hash in your browser for learning, testing, and prototyping; for a real authentication system you should always hash on the server with a vetted library, store the salt and parameters alongside the digest, and never transmit or log the plain password.